Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1993-07-02
1996-07-16
Morris, Terrel
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
428220, 428288, 428290, 4283166, 4283175, 4283177, 181284, 181286, 181290, 181294, B32B 310, B32B 326, B32B 712, E04B 182
Patent
active
055365566
ABSTRACT:
An insulating laminate, which is particularly suitable for a sound attenuating barrier, such as a contoured vehicle headliner. The disclosed embodiment includes a finish lamina, which may be preferably cloth-like, and a substrate which is preferably structurally stable and self supporting and which may be adapted to absorb sound primarily at predetermined higher frequencies. In one preferred embodiment, a thin flexible film is located between the finish lamina and the substrate which is adapted to absorb sound primarily at relative lower predetermined frequencies. The film may include a pattern of openings or holes designed to absorb sound primarily at predetermined lower frequencies. In the disclosed embodiment, the substrate includes a porous fiber mat, preferably including fibers having a range of thicknesses to improve sound attenuation at higher frequencies, a structural foam lamina and a reinforcing scrim, preferably comprising spunbonded polyester filaments.
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Indian Head Industries Inc.
Morris Terrel
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